Abstract
Two novel binuclear metal-organic coordination complexes <TEX>$[Cd_2(L)_2(bpy)_2(H_2O)_2]{\cdot}6H_2O$</TEX> (1), <TEX>$[Cd_2(L)_2(phen)_2-(H_2O)_2]{\cdot}2H_2O$</TEX> (2) (where L = 2-methylquinoline-3,4-dicarboxylate dianion, bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline) have been synthesized under hydrothermal conditions and characterized by single crystal Xray diffraction, spectral method (IR), elemental analysis and thermal gravimetric analysis (TGA). Both 1 and 2 consist of two Cd(II) atoms bridged by two monoatomic bridging carboxylate groups from two L ligands, and the second carboxylate group of each L is monodentately coordinated to Cd(II), creating a sevenmembered chelating ring. The coordination at each metal nucleus is completed by a water molecule and a chelating bidentate molecule. The 3D structures of the complexes are stabilized by <TEX>${\pi}-{\pi}$</TEX> stacking interactions and hydrogen-bonds.
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